1.中国科学院电子学研究所 北京 100190;2.微波成像国家重点实验室 北京 100190
TN95
国家自然科学基金重点基金项目(61431018)、国家自然科学基金青年基金项目(61201404)资助
1.Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; 2.National Key Laboratory of Microwave Imaging, Beijing 100190,China
多角度SAR特指成像系统随平台直线运动，实现大波束范围内多个不同角度场景连续成像的新观测手段。为满足多角度数据的获取需求，观测波束一般需大于90°，超宽波束的观测方式增加了系统的复杂度，使得观测参数之间的约束关系变得错综复杂，给数据获取方法设计及系统参数设计带来了挑战。提出了一种基于分离相位中心多波束技术的数据获取方法，有效地降低了系统PRF，并针对实际系统设计中的相位中心间距过小的问题，提出了一种交错式的数据采样方法，使得相位中心间距由中心数目和空间采样间隔共同决定，提高了系统设计的灵活性。
Multiangle SAR refers to a new observation method that imaging system moves along a straight line and obtains continuous images of multiple different angle scenes in a large beam. In order to meet the data acquisition needs of multiple angles, observation beam usually takes more than 90 degrees. The use of ultra wide beam increases the complexity of the system, makes the observation parameters more complicated, and brings the challenge to the method of data acquisition and the system parameters design. This paper proposes a data acquisition method based on displaced phase center multiple azimuth beams technology, this method reduce the system’s PRF effectively. For the phase center spacing is too small in practical system design, put forward a interleaved data sampling method, the new method make the phase center spacing decided by the number of phase centers and the spatial sampling interval, which increases the flexibility of system design.
郑保文,林赟,洪文.一种基于分离相位中心多波束技术的交错式数据获取方法研究[J].国外电子测量技术,2016,35(8):26-31
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